<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>验证用户名和密码</title>
</head>
<body>
    <script>
        while(1){
        var name=prompt("请输入用户名：");
        var key=prompt("请输入密码:");
        if(name=="admin"||key=="123456"){
            alert("登录成功");
            break;
        }else{
            alert("用户名或密码有误");
        }
        }
    </script>
</body>
</html>